<?php

function image_path($thumb_pic='',$def_img='images/default_head.png'){
	if(substr($thumb_pic,0,4)=='http'){
		return $thumb_pic;
	}
	$base_url = base_url('');

	//if(!file_exists('../'.$thumb_pic) || empty($thumb_pic)){
	if(empty($thumb_pic)){
		
		
		return $base_url.$def_img;
	}
	
	return $base_url.$thumb_pic;
}


function getFirstCharter($str){ 
	if(empty($str)){
		 return '';
	}
	
	$fchar=ord($str{0}); 
	if($fchar>=ord('A')&&$fchar<=ord('z')){
		return strtoupper($str{0});
	}
		 
	$s1=@iconv('UTF-8','gb2312',$str); 
	$s2=@iconv('gb2312','UTF-8',$s1); 
	$s = $s2==$str?$s1:$str; 
	$asc=ord($s{0})*256+ord($s{1})-65536; 
	if($asc>=-20319&&$asc<=-20284) return 'A'; 
	if($asc>=-20283&&$asc<=-19776) return 'B'; 
	if($asc>=-19775&&$asc<=-19219) return 'C'; 
	if($asc>=-19218&&$asc<=-18711) return 'D'; 
	if($asc>=-18710&&$asc<=-18527) return 'E'; 
	if($asc>=-18526&&$asc<=-18240) return 'F'; 
	if($asc>=-18239&&$asc<=-17923) return 'G'; 
	if($asc>=-17922&&$asc<=-17418) return 'H'; 
	if($asc>=-17417&&$asc<=-16475) return 'J'; 
	if($asc>=-16474&&$asc<=-16213) return 'K'; 
	if($asc>=-16212&&$asc<=-15641) return 'L'; 
	if($asc>=-15640&&$asc<=-15166) return 'M'; 
	if($asc>=-15165&&$asc<=-14923) return 'N'; 
	if($asc>=-14922&&$asc<=-14915) return 'O'; 
	if($asc>=-14914&&$asc<=-14631) return 'P'; 
	if($asc>=-14630&&$asc<=-14150) return 'Q'; 
	if($asc>=-14149&&$asc<=-14091) return 'R'; 
	if($asc>=-14090&&$asc<=-13319) return 'S'; 
	if($asc>=-13318&&$asc<=-12839) return 'T'; 
	if($asc>=-12838&&$asc<=-12557) return 'W'; 
	if($asc>=-12556&&$asc<=-11848) return 'X'; 
	if($asc>=-11847&&$asc<=-11056) return 'Y'; 
	if($asc>=-11055&&$asc<=-10247) return 'Z'; 
	return null; 
}

//数组排序
function def_array_sort($arr,$field,$csort='SORT_DESC'){
	$sort = array(  
        'direction' => $csort, //排序顺序标志 SORT_DESC 降序；SORT_ASC 升序  
        'field'     => $field,       //排序字段  
	);  
	$arrSort = array();  
	foreach($arr AS $uniqid => $row){  
		foreach($row AS $key=>$value){  
			$arrSort[$key][$uniqid] = $value;  
		}  
	}

	if($sort['direction']){  
		array_multisort($arrSort[$sort['field']], constant($sort['direction']), $arr);  
	}
	return $arr;
}

?>